(19)
(11) EP 1 861 920 A2

(12)

(88) Date of publication A3:
05.04.2007

(43) Date of publication:
05.12.2007 Bulletin 2007/49

(21) Application number: 06739337.1

(22) Date of filing: 16.03.2006
(51) International Patent Classification (IPC): 
H03F 3/68(2006.01)
(86) International application number:
PCT/US2006/010498
(87) International publication number:
WO 2006/102466 (28.09.2006 Gazette 2006/39)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

(30) Priority: 24.03.2005 US 90577

(71) Applicants:
  • Cree Microwave, Inc.
    Sunnyvale, CA 94089 (US)
  • CREE, INC.
    Durham, NC 27703 (US)

(72) Inventors:
  • PENGELLY, Raymond, S.
    Hillsborough, NC 27278 (US)
  • CRESCENZI, James, E., Jr.
    Cambria, CA 93428 (US)
  • WOOD, Simon, M.
    Los Gatos, CA 95032 (US)
  • DEKKER, Tom, Stewart
    Durham, NC 27701 (US)

(74) Representative: Townsend, Stephen et al
Baron & Warren
19 South End London W8 5BU
19 South End London W8 5BU (GB)

   


(54) HIGH POWER DOHERTY AMPLIFIER USING MULTI-STAGE MODULES